Automated submodule update: FBGEMM (#42496)
Summary:
This is an automated pull request to update the first-party submodule for [pytorch/FBGEMM](https://github.com/pytorch/FBGEMM).
New submodule commit: https://github.com/pytorch/FBGEMM/commit/87c378172a7fa757a8f0f015f31d4f6111d4744e
Pull Request resolved: https://github.com/pytorch/pytorch/pull/42496
Test Plan: Ensure that CI jobs succeed on GitHub before landing.
Reviewed By: dskhudia
Differential Revision: D22911638
fbshipit-source-id: f20c83908b51ff56d8bf1d8b46961f70d023c81a
